Paper box structure



J= 1 v J. H. Q BRIEN I 1 1 2,308,384

I PAPER BOX STRUCTURE Filed Jul 8. 1940 Patented Jan. 12, 1943 1 UNITEDSTATES PATENT OFFICE 1 Claim.

This invention pertains to the art of making paper boxes.

An object of the invention is to provide new and novel forms of boxparts and a new and novel manner of assembling the same into a completebox of that type, for example, employed for bakery goods and the likewhere such a container is to be folded for enclosing a commodity at thetime of sale of such commodity.

Another object is that of constructing a box exceedingly strong andsturdy and capable of withstanding considerable abuse due to thestructure employed.

That the invention may be thoroughly understood the appended drawing isprovided forming part hereof wherein:

Figures 1 and 2 are plans of the separate blanks as parts employed inconstructing a box according to the invention;

Figure 3 shows in perspective a box body folded into the form shown froma blank such as illustrated in Figure 2;

Figure 4 shows in perspective the blank illustrated in Figure 1 aftercertain parts of said blank are folded into given positions;

Figure 5 is likewise a perspective according to Figure 4 to which otherfolding operations have been applied, and upon which the box body ofFigure 3 has been superimposed;

Figure 6 is a plan in part section of parts of the box structure;

Figure '7 is a perspective of the appearance of parts of the box showingother folding operations in addition to those shown in Figure 5, and

Figure 8 is a perspective of the box as viewed at a side opposite thatshown in Figures 5 and 7 The box of the present invention is preferablyconstructed of corrugated paper having an outer covering of plain orornamental paper and is comprised of two separate parts shown as blanksin Figures 1 and 2.

In order to more easily and readily identify the several parts of thebox in the several figures of the drawing, the blank shown in Figure 1is provided with several reference characters to de- .be bent up alongthe dotted lines indicated in Figure 1, which line is shown as extendingthroughout the length of the figure. Likewise, dotted lines extendingtransversely of the figure denote the boundaries of the several zones,the paper being bent along said lines in the act of creating the box aswill appear later herein.

Figure 2 shows a blank 8 of the paper as a part separate from the blankjust described, this being bent at three places indicated by dottedlines extending transversely of the figure. When so bent the paper stripforms a rectangular tubular member as in Figure 3, the extremities ofthe paper being secured relatively by a strip 9, or other suitablemeans, this structure forming the box body, or box frame.

In Figure 4 as the first steps in forming a box the opposite flaps 5 arebent up at right angles to the plane of the paper blank, the flaps 4'and 6 being bent over upon said blank.

It is observed now, in Figure 5, that the rectangular portion 8 which isto form the body of the finished box is placed in position upon theblank, the edges of two opposite walls thereof 1ying upon the lattertransversely thereof between the zone 5 and adjacent zones 4 and 6 whileenclosing the two upstanding flaps 5, said flaps serving to locate saidportion 8 and prevent shifting thereof.

In the next step of creating the box the zone 6 is bent up toward theadjacent wall of the rectangular portion 8 as in said Figure 5,following which the zone I is bent over and down to lie against theinner surface of the said wall as in Figure 7 and at the same time thflaps 1' thereof may be bent at right angles to zone 1 and lie eachagainst one of two other opposed walls. The flap I thus constitutes whatmay be termed a lock for the zone 6, holding the latter in abutment withthe wall over which the flap hangs.

Figure 8 shows the nearly completed box as seen from the opposite sidethereof by rotating the box through about its base from the positionshown in Figure 7. In said Figure 8 it will be observed that the zones 3and 4 have been raised, the latter being made to abut the adjacent wallwhile the zone 3 is to serve as the cover for the completed box, theflap 3 having been bent at right angles to the plane of zone 3 as shownin said Figure 8 and in Figure 5 in dotted lines, the zone 2 also havingbeen so bent. The said zone 2 and the flaps 3' enter the rectangularbody and lie against the inner surfaces of the box walls, said flaps 3'preferably being made to lie between said walls and the flaps 'l' asshown in Figure 6, in which figure the zone 2 and said flaps 3 are showninsection. By this disposal of the last named considerable friction iscreated between the named parts and the top zone 3, therefore,efiectively seals the enclosed space.

A slot I0 may be cut in the zone 2 in such a manner as to leave aprojection l l extending from zone 3 to form a convenient extended lipfor lifting the constituted lid or cover.

While the flaps 4 and 6' may not be used it is clear that their useprovides for a smooth appearance of the paper at the corners of the boxrather than a cut edge were the flaps not employed.

The upstanding flaps 5 and the box portion 8 combine to provide a verystrong structure at the walls of the latter at their lower extremitiesat the box bottom and when the lid or cover portion 2, 3, 3 is closedthe flaps 3', particularly when seated between the box walls and theflap 1, completes the reinforcing of the Walls at the upper extremities,the zones 6 and I naturally serving to add largely in the reinforcing.

In practice box portions 8 provided with the corner connecting strips 9may be kept in stock in flat collapsed form ready for the moment ofassembling the container parts for immediate use by the several stepsalready outlined.

While a preferred structure is shown and described it is to beunderstood that slight changes may be made but only such as may liewithin the present invention and the claim to follow.

I claim:

A paper box structure comprising a long and relatively narrow strip ofmaterial having an upstanding flap portion at each of two opposite edgesparalleling the longest measurement of said strip and spaced apart thewidth of the same, a tubular rectangular member open at both endserected at one of its ends upon the strip and enclosing the said flapportions, two opposite walls of the member abutting the flap surfaces,two other walls of said member abutting the ends of the flap portionsand locating the same, said strip having an extended portion at one endabutting upon a wall of the member, said portion terminating in a zoneadapted to be folded over the top edge of said wall of said member atthe open end thereof and engaging upon the inner surface of that wall,said zone having at each end an extended flap, each flap normallypositioned adjacent the inner surface of one of two walls of the memberlying at right angles to the last above named wall in the named positionof said zone, the end of the strip opposite that having the namedextended zone-carrying portion adapted to overlie the open end of themember, and having a pair of flap portions at its edges adapted each toengage between the named extended flaps of the zone and the wallsagainst which said flaps normally abut.

JAMES H. O'BRIEN.

